Nasal mask



FIG. 1 is a perspective view of a nasal mask in accordance with our new design, the broken line showing is for illustrative purposes only and forms no part of the claimed design.

FIG. 2 is an additional perspective view of a nasal mask in accordance with our new design.

FIG. 3 is a front view of the nasal mask shown in FIG. 1.

FIG. 4 is a side view of the nasal mask shown in FIG. 1. The opposite side is similar and not separately illustrated herein.

FIG. 5 is a back view of the nasal mask shown in FIG. 1.

FIG. 6 is a top view of the nasal mask shown in FIG. 1; and,

FIG. 7 is a bottom view of the nasal mask shown in FIG. 1. 

The ornamental design for a nasal mask, as shown and described. 